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undergraduate thesis
Stabilizacija Al2O3 suspenzija limunskom kiselinom
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. urn:nbn:hr:235:149005
Burčul, Mihovil
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Burčul, M. (2018). Stabilizacija Al2O3 suspenzija limunskom kiselinom (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:149005

Burčul, Mihovil. "Stabilizacija Al2O3 suspenzija limunskom kiselinom." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:149005

Burčul, Mihovil. "Stabilizacija Al2O3 suspenzija limunskom kiselinom." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:149005

Burčul, M. (2018). 'Stabilizacija Al2O3 suspenzija limunskom kiselinom', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 13 July 2024, https://urn.nsk.hr/urn:nbn:hr:235:149005

Burčul M. Stabilizacija Al2O3 suspenzija limunskom kiselinom [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2018 [cited 2024 July 13] Available at: https://urn.nsk.hr/urn:nbn:hr:235:149005

M. Burčul, "Stabilizacija Al2O3 suspenzija limunskom kiselinom", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:235:149005

Metadata
TitleStabilizacija Al2O3 suspenzija limunskom kiselinom
Title (english)Stabilization of Al2O3 suspensions with citric acid
AuthorMihovil Burčul
MentorLidija Ćurković (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2018-09-27, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom radu pripravljene su 70%-tne Al2O3 vodene suspenzije uz različiti udio limunske kiseline kao disperzanta. Suspenzije su homogenizirane u planetarnom mlinu, potom im je izmjerena pH vrijednost te uklonjeni mjehurići zraka u ultrazvučnoj kupelji. Rotacijskim viskozimetrom izmjerena je viskoznost suspenzija te snimljeni dijagrami tečenja (ovisnost smičnog naprezanja o smičnoj brzini te ovisnost viskoznosti o smičnoj brzini). Iz dobivenih rezultata određen je i optimalni udio disperzanta tj. limunske kiseline, koji iznosi 0.1 %. Stabilnost suspenzija pri različitim pH vrijednostima ispitana je sedimentacijskim testovima na 20 %-tnim suspenzijama aluminijevog oksida uz dodatak optimalne količine disperzanta. Dobiveni rezultati pokazuju da su 20 %-tne suspenzije aluminijevog oksida stabilne do 96 sati pri pH vrijednosti oko 2 i između 8 i 11 , a nakon sedam dana sedimentiraju u potpunosti.
Abstract (english)
In this paper 70 wt.% aqueous Al2O3 suspension were prepared with different amounts of citric acid as a dispersant. Suspensions were homogenized using a planetary ball mill, after which pH values were measured and air bubbles removed using an ultrasonic bath. The rotational viscosimeter was used to measure the viscosity of prepared suspensions and to record flow curves (dependence of shear stress on shear rate and dependence of viscosity on shear rate). From the obtained results, the optimal amount of dispersant i.e. citric acid was determined and amounts to 0.1 wt.%. Stability of the prepared suspensions at different pH values was evaluated by sedimentation tests on 20 wt.% aluminum oxide suspensions, with the addition of an optimum amount of dispersant. The obtained results show that 20 wt.% aluminum oxide suspensions are stable for 96 h at pH values 2 and from 8 to 12, while after 7 days they completely settled as sediment.
Keywords
Languagecroatian
URN:NBNurn:nbn:hr:235:149005
ProjectNumber: IP-2016-06-6000
Title: Napredna monolitna i kompozitna keramika za zaštitu od trošenja i korozije
Acronym: WECOR
Leader: Lidija Ćurković
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-05-22 23:15:37